Home / 20,147.49-30,221.52-7,000.11

Finding the Fourth Proportional to 20,147.49, 30,221.52 and 7,000.11

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Solution

The fourth proportional to 20,147.49, 30,221.52 and 7,000.11 is: 10,500.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.49 : 30,221.52 = 7,000.11 : x
  2. Step 2: Convert to fraction form
    20,147.49/30,221.52 = 7,000.11/x
  3. Step 3: Cross multiply
    20,147.49x = 30,221.52 × 7,000.11
  4. Step 4: Simplify right side
    20,147.49x = 211,553,964.37
  5. Step 5: Solve for x
    x = 211,553,964.37/20,147.49
  6. Step 6: Final answer
    x = 10,500.26

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.